Cell division
Texto del Guión Gráfico
- Let's start with the first stage, Prophase. The nuclear membrane disappears and chromosomes become visible. Centrioles start to form fibers and move to opposite sides of animal cells.
- So only animal cells have centrioles?
- The first part of the cell cycle is Interphase.
- Interphase is where the cell spends most of it's life where it prepares for mitosis.
- What? A test? What's going on, I was sleeping.
- Now, mitosis is split into four main parts. Prophase, Metaphase, Anaphase, and Telophase. Write these down guys, we're going to have a test on this topic in two weeks.
- Chris: I'll write the notes, and you can do the homework.
- Ethan: Cool with me
- Can you explain what happens in these phases.
- Metaphase...fibers from prophase...chromosomes...center of the cell
- The next stage is metaphase. This is when the fibers from prophase attach to chromosomes helping them form a clear path in the center of the cell.
- The next stage in the cell cycle is anaphase.
- During anaphase, chromosomes are pulled from the center of the cell by fibers, and are pulled to opposite sides of the cell.
- If something were to go wrong in the cell cycle, the cell would prevent cell division if the DNA is damaged, didn't get proper nutrients, and if DNA hasn't been replicated.
- In telophase, each set of DNA splits off from the parent cell, to later become two daughter cells.
- Mistakes can also happen in the cell cycle. Which include an abnormal nucleus, non-specialized cells, and many more.
- The last step of the cell cycle is Cytokinesis. Cytokinesis is when the whole cell splits into two daughter cells from the parent cell.
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